The area is heavily treed and hilly. My place is in a bowl and the neighbor that most frequently watches over my place lives a 1/2 mile west of my place on a hill. Her place is about 40 meters higher in elevation than my place. There is a 10 meter higher hill in between our places so no line of sight.@arakboss can you elaborate a tad more on the scenario to solve for?
Would you be home and they are home?
What distance between the homes? Any substantial hills or dense woods between the homes?
If within say 1/2 to 1 mile, what about simple, non-programmable GMRS-type radios? Everyone leaves them on as agreed-upon, can communicate over those?
Most of my neighbors have acquired these types of radios. We all agreed to monitor a particular channel/frequency if things got stupid out there. We've even done some testing to ensure good signal (ie., inside home to inside another home).
I was just spitballing thinking about whether you could operate a Dakota alert type of device over longer distances without expensive equipment?